Duplex roll of corrugated paper and method and means for making the same



March 21, 1933. B ROUS 1.902312 DUPLEX ROLL OF CORRUGATED PAPER AND METHOD 'AND MEANS FOR MAKING THE SAME Filed July 5, 1929 2 Sheets-Sheet l INVENTOR BY I March 21, 1933. ous 1,902,312

DUPLEX ROLL OF CORRUGATED PAPER AN ETHOD AND Ns FOR MAK THE SA 1 iled July 5, 29 2 Sheets-Sheet 2 m r- T Q 0 3 2 K p w 2 u v v- Patented Mar. 21, 1933 UNITED STATES BERNARD ROUS, OF BROOKLYN, NEW YORK DurLEx' ROLL or. CORRUGATED PAPER, AND METHOD AND 1 r rrm SAME MEANS FOR MAKING Application filed. July 1929. Serial No. 376,091.

The invention relates to a duplex 'roll of corrugated paper and method-and means for manufacturing such roll.

' The well known form of corrugated paper 5 which comprises a corrugated sheet anda single facing glued together is manufactured and shipped in large rolls. While these rolls are comparatively light'in weight, they are extremely bulky and occupy much space, making the transportation costshigh in proportion to the value of the roll. Moreover, concerns using a substantial amount of corrugated paper are forced to devote a large space for storage of the rolls because of their bulkiness. g p

In the roll of corrugated paper as manufactured at thepresent time the corrugated sheet and facing sheet are secured together and are wound on a mandrel. Naturally the i 2 corrugated sheet occupies a great part of the space in the roll and causes the roll to be large "regardless of how tightly it may be wound. It is proposed under the present invention to utilizepart of thisspace by winding into the 2 roll another corrugated sheet and facing sheetflikewise a duplexroll. w The advantage of this novel departu're is that a roll of corrugated paper is produced glued together, thus forming .3 which contains almost double the amount of the single roll and occupies substantially the same space in transportation and storage.

come apparent as the specification proceeds.

hereof: v

Fig. 1 is a perspective view of a duplex roll of corrugated paper made in accordance with theinvention. In this view the roll is shown as being partly unwound so as to clearly il- .45 a means for manufacturing the duplex roll.

Referring again to the said drawings, andv particularly to Figs. land 2, the reference numeral 2 designates the duplex roll of corrugated paper. The roll is made up of two complete sheets or webs of corrugated paper.

Referring to the drawings forming a part One of these consists of the corrugated sheet 3 and the facing sheet 5 united together in the usual manner. The other consists of the corrugated sheet 4 and the facing sheet 6 likewise united together.

In the roll the facing sheets5 and 6 lie next each other and are tightly" wound'in relation to eachother. The corrugated sheets 3 and4 are intimately associated so that'their corrugations rest within each other. Nevertheless, when the roll is unwound as indicated inFig.- 1 the two corrugated sheets readily separate and fall away from each other. It will be apparent from an inspection of Figs. 1 and 2 that the duplexroll of corrugated paperwill contain almost doublelthe amount of the ordinary singleroll. g

It is important in the manufacture of the product to corrugate the'two sheets at the same time so that they may be caused to nest with each other and tomaintain this intimate relation while the facing sheets are being applied and until the duplex roll has been Wound. i

An apparatus for manufacturing the duplex roll of-corrugated paperi'sdi-agramma'tically illustrated in Fig. '3.

Two webs of paper 7 and 8 whichllater 7 'form' the corrugated sheets 3 and 4' are suitably supported and are fed over a corrugating roller 9. QThe corrugating'roller 9 'mes'hes with another corrugating roller 10 Further objects and advantages will be-' and as the sheets from the webs 7 and 8 passbetween the pairof corrugating rollers 9 and 10 they are corrugated and intimately associated; Any well known means may be provided for rotating the corrugating rollers. i

Because the'two sheets are corrugated si- 'multaneously' this. intimate relation is insured. This is an "important feature of the invention, since it would be practically impossible to form the two sheets separately and match up the corrugations afterwards, due

to the varying diameters ofthe roll.

. After the sheets have been simultaneously corrugated an adhesive is applied to the outer corrugated sheet 3. A roller 11 rotates'in a glue well 12 and transfers the" adhesive to another roller 13, which in turntransfersit to the sheet 4. The extensions 22, which are to the sheet 3. Guide fingers 14 lying in slots of the roller 13 allow the corrugated sheets to fall away slightly from the corrugating roller 10 and contact with the periphery of the roller 13.

Means are provided in conjunction with the corrugating rollers for introducing the facing sheet 5 and causing it to be secured to the corrugated sheet 3 by the adhesive supplied by roller 13. The facing sheet 5 is fed from a Web 15 over guide rollers 16 and 17 and under a pressure roller 18, which presses the facing sheet 5 against its corrugated sheet 3, so as to insure the adhesive holding it there. I

It is important that the two corrugated sheets be maintained in their intimate relationship until they are later wound .on the completed duplex roll. After :leaving the corrugating roller '10 and pressure roll 18, the corrugated sheets-3 and 4 and facing sheet 5 pass over curved guide members 19. The guide members 19 might be in the form of rods, or if desired .a plate could be used. The guide members are so curved that the corrugated sheets ride on the convex side with the facing sheet 5 outermost. A sufficient tension is thus maintained. to insure the corrugated sheets remaining undisturbed.

.After leaving the guide members 19, the sheets pass over a roller 20, andthence over other 7 guide members 21, which are also curved in the same manner and. for the same reasons. as guide members 19. The guide members 21 have extensions 22 beyond a guide roller 23.

. The adhesive is applied to the-corrugated sheet 4 in the region beyond the roller 23.

A, roller 24 is rotatably mounted in the glue well 25.-- This roller. 24 transfers the glue to I another roller 26, which in turn transfers it in the form ofblades', rest in slots or cut-out portions of the roller 26'.

{Pivoted at 27 to the-blades 22 are fingers 28, which act as supports for the sheetsuntil they reach the winding mandrel or shaft 29. The fingers 28 are pivoted so as to function as supports for the sheets while the diameter of the completed roll is-increasing on the mandrel 29.

The facing sheet 6 is preferably secured to the corrugated sheet. 4: in conjunction with the winding of the roll. This facing sheet 6 passes from a web roll 30 over 'guidefrollers 31 and '32- and thence over a pressure roll 33,

which causes the adhesive applied byroller 26 to hold the facing sheet 6 and corrugated sheet ltogether. The" adhesive is given a further chance to setby reason of the stretch caused by the facing sheet 6 being wound on the outside of the roll.

As the diameter of the duplex roll increases on the mandrel 29, the pressure roller 33 vled in in proper relation to the duplex roll as the latter increases in diameter, the pressureroll 33 and guide roller 32 are" mounted on arms 37 pivoted in bearings at the ends of the guide roller 31.

The fingers 28 are connected together by a rod 38, so as to keep them from being displaced laterally and coming in contact with the adhesive applied by roller 26; The rod 38 has a slotted connection 39 with the arm 37. Thus, the weight 35 will act to maintain the fingers in their proper relation to the sheets and the duplex roll as it is being wound. I I

Numerous changes may be made in details of construction and arrangements of parts in the aforesaid apparatus for manufacturing the duplex roll of corrugated paper, and all such changes are to be construed as coming Wltl1i11 the scope of the appended claims.

I claim: V

1. A duplex roll of single-faced corrugated paper, each p'artof which comprises a facing sheet and a corrugated sheet secured together, the facing sheets lying smoothly adjacent each other in said roll and the corrugated sheets being intimately associated .an d separable.

2.,Means for manufacturing a duplexroll of corrugated paper comprising in comblnat1'on,means for corrugatmg and intimately associating two sheets of paper, means for securing facing sheets to the respective corrugated sheets, and means for winding the two, corrugated and faced sheets into a duplex nested roll, the means for associating the facing sheet which is outermost in the convolutions of the duplex roll' operating in conjunction with the winding means.

3. Means for manufacturing a duplex roll of corrugated paper comprismg 1n combination, a pair of corrugating rollers for corirrigating and intimately associating two sheets of paper, meansoperating in conjunction with said corrugatmg rollers for introducing and securing a facing sheet tov one of said corrugated sheets, means for winding the duplex roll of paper, and means in conjunction with said winding means for introducing and securing a facing sheet other corrugated sheet.

4. Means for manufacturing a duplex roll of corrugated paper havingjin combination, a pair'of corrugating rollersfor corrugating and intimately associating two separate sheets of paper, means for applying adhesive to one ofsaid corrugated sheets, means for to the introducing a facing sheet so that it will be secured to said corrugated sheet by said adhesive, means for applying adhesive to the other of said corrugated sheets, means for introducing and securing to said secondmentioned corrugated sheet by said adhesive another facing sheet at the same time that the sheets are wound into aroll, and means for closely winding all said sheets into a duplex roll.

5. Means for manufacturing a duplex roll 1 of corrugated paper comprising in combination, a pair of corrugating rollers for corrugating and intimately associating two sheets of paper, means operating in conjunction with said corrugating rollers for introducing and securing a facing sheet to one of said corrugated sheets, means for winding said duplex roll, means in conjunction with said winding means for introducing and securing a facing sheet to the other of said corrugated sheets, and means for maintaining the intimate relation of said corrugated sheets in their travel from the corrugating rollers to the winding means. I

6. The method of manufacturing a duplex roll of corrugated paper, which comprises supplying two sheets of paper and corrugating them together, supplying a facing sheet and applying it to one of the corrugated sheets, supplying another facing sheet and applying it to the other corrugated sheet at the same time that the sheets are wound into a roll, and winding the sheets upon the roll.

7 The method of manufacturing a duplex roll of corrugated paper, which comprises supplying two sheets of paper and corrugating them together, applying adhesive to the outer side of one of the corrugated sheets, supplying a facing sheet and causing it to adhere to this corrugated sheet, applying adhesive to the outer side of the other corrugated sheet, introducing another facing sheet and attaching it to the latter corrugated sheet at the same time that all the sheets are wound into a roll, and winding the sheets upon the roll.

BERNARD ROUS. 5O 

